Question

Write a rule for a function, P

P, that gives the perimeter of a square in inches when the side length is x

x inches.

Answer 1

Let x be the length (in inches) of the side of a square, then the perimeter $\displaystyle P(x)$ of the square (in inches) is;

$\displaystyle P(x)=x+x+x+x=4x$